fix(import): add tracing spans to all import related functions (#8160)

# Which Problems Are Solved

This fix adds tracing spans to all V1 API import related functions. This
is to troubleshoot import related performance issues reported to us.

# How the Problems Are Solved

Add a tracing span to `api/grpc/admin/import.go` and all related
functions that are called in the `command` package.

# Additional Changes

- none

# Additional Context

- Reported by internal communication

internal/domain/human.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/zitadel/zitadel/internal/crypto"
 	es_models "github.com/zitadel/zitadel/internal/eventstore/v1/models"
+	"github.com/zitadel/zitadel/internal/telemetry/tracing"
 	"github.com/zitadel/zitadel/internal/zerrors"
 )
 
@@ -104,7 +105,10 @@ func (u *Human) EnsureDisplayName() {
 	u.DisplayName = u.Username
 }
 
-func (u *Human) HashPasswordIfExisting(ctx context.Context, policy *PasswordComplexityPolicy, hasher *crypto.Hasher, onetime bool) error {
+func (u *Human) HashPasswordIfExisting(ctx context.Context, policy *PasswordComplexityPolicy, hasher *crypto.Hasher, onetime bool) (err error) {
+	ctx, span := tracing.NewSpan(ctx)
+	defer func() { span.EndWithError(err) }()
+
 	if u.Password != nil {
 		u.Password.ChangeRequired = onetime
 		return u.Password.HashPasswordIfExisting(ctx, policy, hasher)